A/C Compressor

Does anyone know how to identify the A/C compressor on a 2000 Silverado 5.3? It's either a Denso or HU6, I can't see any name or model # on it.

thanks,
Bert

http://tinypic.com/ei2g51

Densos have separate high and low side manifolds bolted to the compressor- Hu-^s are on a common manifold block.

Thank you Sir! Now I know which clutch to look for.

Bert